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Eight states comprising 28 percent of the U.S. passenger vehicle market are expected today to add more details to their 2013 announced plan for 3.3 million zero emission vehicles by 2025.

The governors of these states – California, Connecticut, Maryland, Massachusetts, New York, Oregon, Rhode Island and Vermont – last year signed a memorandum of understanding devoted to regulatory and incentives-backed boosts to ZEVs.

All these states follow California’s Air Resources Board rules, at least in general, but expected announcements may still be short on specifics.

The “ZEV Action Plan” is however expected to be added to, which the Wall Street Journal said is “ambitious” as it points out that ZEVs have less than 1 percent U.S. market share.

That’s one way of looking at it, or it could be because the demand for the most environmentally sustainable, and lowest fuel-consuming vehicles is yet small, more is being seen as needed to spur sales.

Either way, there is a tug-of-war ongoing in the politicized court of public opinion, as many pro-alternative energy proponents are more than aware.

Plans for more plug-in cars and also fuel cell vehicles are part of the mix, and the announcement is expected to just precede an Obama administration announcement next Monday against climate change that’s projected to see opposition this summer.

Much pushback from the U.S. energy industry – particularly “clean coal” lobbying organizations – is expected in that announcement.